20188324860 has 72 divisors (see below), whose sum is σ = 62133346128. Its totient is φ = 4894137600.

The previous prime is 20188324853. The next prime is 20188324901. The reversal of 20188324860 is 6842388102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1383121 + ... + 1397640.

Almost surely, 2^20188324860 is an apocalyptic number.

20188324860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20188324860 is an abundant number, since it is smaller than the sum of its proper divisors (41945021268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20188324860 is a wasteful number, since it uses less digits than its factorization.

20188324860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780795 (or 2780782 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The spelling of 20188324860 in words is "twenty billion, one hundred eighty-eight million, three hundred twenty-four thousand, eight hundred sixty".